Q. 174.2( 25 Votes )

Subba Rao s

Answer :

Initial salary of Subba Rao is Rs. 5000

That is first term (a) = 5000


He receives Rs.200 every year as increment


So, common difference (d) = 200


The year when he reaches Rs. 7000


So, an = 7000


an = a +(n-1)d


7000 = 5000 + (n-1) 200


2000 = 200(n-1)


10 = n-1


n = 11


So, it takes him 11 years to reach Rs. 7000


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